NOTE: These tubes have identical construction to Brimar 6060 T Series Tubes (Item 10). Sonically we cannot tell the difference. Very likely, civilian version of this Valve was marketed as Brimar 6060 with T(Trust) Series Logo. Both of these tubes have very particular black plate construction with copper grid posts, different from the later production Brimars.

Lightly used, Like New 1960s Brimar Military Production CV4024 12AT7WA tubes with Black Plates and copper posts. Made in England. Labels are not perfect but the tubes are in very good shape. Couple of variations on the label font, thicker (2 tubes on left) and thinner smaller font (2 tubes on the right). Repacked in white boxes. Very desirable 12AT7/ECC81 type tube for both Audio and Guitar applications.

Tested and matched on Top of the Line Calibrated Hickok 580 Lab Grade Tester. 100% is roughly 5500 mmhos on this tester for 12AT7. 

Matched Pair = $50.